recirulation fan for powdercoat oven

[volkaholic]

I've been powdercoating for about 2 years now using a normal kitchen type oven in my shop. I'm ready to build a bigger unit to handle motorcycle frames. I'm planning on going 32" X 32" X 60" tall, so I can hang the frames easy. Because it will be so tall, recirculation of the air will be important. I plan to take heated air from the top & duct it back down to near the bottom. I have been checking out this forum & have not seen too much about fan.

I need a fan that can handle the high temps (550 deg F max) for extended periods of time & a gentle air flow (low cfm) so it doesn't blow dust around or blow the powder off the parts.

Any suggestions on fan type, brands, vendors, salvage parts, etc? Relative costs?

[Popeye]

That's pretty close to our oven size. We added a small fan at the bottom and it works very well. Many monies for a high temp blower!!
You should be able to mount a small motor on the outside of the oven and run the shaft through the sidewall and mount a small blade 5 or 6". We installed two smaller blades on the fan shaft on the outside of the oven as a heat sling.
Total we spent about $50

[edwardpic]

we used a draft inducing fan from Grainger, pulls the hot air that rises from the top center, ducted down the back wall and diffused with a panel on the bottom inside, works great-moves the air but doesnt blow powder off...we speant about $79 on the blower and its made for furnaces so can handle the heat.

Ed

[wrascal]

Have you ever looked at the blowers that are used in "air tight wood stoves".......... they are designed to move lots of air, have variable speed and have no problem with heat like that.

Russ

[edwardpic]

BLOWER,INDUCED DRAFT
Induced Draft Blower, Metal Housing, 0.6 Amp Shaded Pole Motor Grainger Item # 4MH09
Your Price (ea.) $58.75
Brand FASCO
Mfr. Model # 70022771
Ship Qty. 1
Sell Qty. (Will-Call) 1
Ship Weight (lbs.) 6.15
Usually Ships Today
Catalog Page No. 3774

hope that helps---Ed

[Timmer]

ED...Do you have a pic of that bad boy installed?

[edwardpic]

Yes, from the inside with the diffusers, you will have to email me, the pictures are too large to post here. I can take a picture from the top next week showing the mounting.

Ed

[datadawg]

edwardpic, can you email a couple of the pics of your blower setup? I am starting the framing of my oven tomorrow and want to make sure i set the fan up correctly.
Thanks

[cordcutter]

edwardpic, If you email the pics of your set up on how you ran your fan and air duct I can put them on my photobucket account and post them on here for all to see or post the link for people to see. I would also like to see how you did it.

Thanks